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Joystick.cpp
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Joystick.cpp
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/***************************************************************************
Joystick.cpp - description
-------------------
begin : Sat Feb 14 2004
copyright : (C) 2004 by upi
email : upi@feel
***************************************************************************/
#include "SDL.h"
#include "Event.h"
#include "common.h"
#include "Joystick.h"
#include <string.h>
CJoystick g_oJoystick;
CJoystick::CJoystick()
{
m_iNumJoysticks = 0;
}
CJoystick::~CJoystick()
{
}
int InitJoystick()
{
return g_oJoystick.Init();
}
int CJoystick::Init()
{
m_iNumJoysticks = 0;
int iResult = SDL_InitSubSystem(SDL_INIT_JOYSTICK);
if ( iResult < 0 )
{
debug( "CJoystick::Init() failed: %s\n", SDL_GetError() );
return 0;
}
int iNumJoysticks = SDL_NumJoysticks();
debug( "CJoystick::Init(): Number of joysticks is %d\n", iNumJoysticks );
int i;
for ( i=0; i<iNumJoysticks; ++i )
{
const char* poName = SDL_JoystickName(i);
debug( "CJoystick::Init(): Joystick #%d is '%s'\n", i, poName );
SDL_Joystick* poJoystick = SDL_JoystickOpen(i);
if ( NULL == poJoystick )
{
continue;
}
m_apoJoysticks[m_iNumJoysticks] = poJoystick;
m_apcJoystickNames[m_iNumJoysticks] = poName;
m_abWorkaround[m_iNumJoysticks] = false;
m_aiHorizontalAxis[m_iNumJoysticks] = 0;
m_aiVerticalAxis[m_iNumJoysticks] = 0;
debug( "CJoystick::Init(): Joystick #%d has %d axes, %d buttons, %d balls, %d hats\n",
i,
SDL_JoystickNumAxes( poJoystick ),
SDL_JoystickNumButtons( poJoystick ),
SDL_JoystickNumBalls( poJoystick ),
SDL_JoystickNumHats( poJoystick ) );
if ( strstr( poName, "SIGHT FIGHTER ACTION USB" ) )
{
m_abWorkaround[m_iNumJoysticks] = true;
debug( "CJoystick::Init(): Infuriatingly stupid joystick detected.\n" );
}
++m_iNumJoysticks;
}
if ( m_iNumJoysticks )
{
SDL_JoystickEventState( SDL_ENABLE );
}
return m_iNumJoysticks;
}
const char* CJoystick::GetJoystickName( int a_iJoystickNumber )
{
if ( a_iJoystickNumber >= m_iNumJoysticks
|| a_iJoystickNumber < 0 )
{
return NULL;
}
return m_apcJoystickNames[a_iJoystickNumber];
}
bool CJoystick::TranslateEvent( const SDL_Event* a_poInEvent, SMortalEvent* a_poOutEvent )
{
a_poOutEvent->m_enType = Me_NOTHING;
switch ( a_poInEvent->type )
{
case SDL_JOYAXISMOTION:
{
int iJoyNumber = a_poInEvent->jaxis.which;
int iAxisNumber = a_poInEvent->jaxis.axis;
int iValue = a_poInEvent->jaxis.value;
if ( iAxisNumber > 1 )
{
// Only translate axis 0 and 1.
return false;
}
if ( m_abWorkaround[iJoyNumber] )
{
iValue = AxisWorkaround( a_poInEvent->jaxis );
debug( "Translated %d to %d\n", a_poInEvent->jaxis.value, iValue );
}
// Try the new value into motion.
int& riOldValue = iAxisNumber ? m_aiVerticalAxis[iJoyNumber] : m_aiHorizontalAxis[iJoyNumber];
if ( -1 == riOldValue )
{
if ( iValue < -3200 )
{
return false;
}
riOldValue = 0;
a_poOutEvent->m_enType = Me_PLAYERKEYUP;
a_poOutEvent->m_iPlayer = iJoyNumber;
a_poOutEvent->m_iKey = iAxisNumber ? Mk_UP : Mk_LEFT;
return true;
}
if ( 0 == riOldValue )
{
if ( iValue < -6400 )
{
riOldValue = -1;
a_poOutEvent->m_enType = Me_PLAYERKEYDOWN;
a_poOutEvent->m_iPlayer = iJoyNumber;
a_poOutEvent->m_iKey = iAxisNumber ? Mk_UP : Mk_LEFT;
return true;
}
if ( iValue > 6400 )
{
riOldValue = 1;
a_poOutEvent->m_enType = Me_PLAYERKEYDOWN;
a_poOutEvent->m_iPlayer = iJoyNumber;
a_poOutEvent->m_iKey = iAxisNumber ? Mk_DOWN : Mk_RIGHT;
return true;
}
return false;
}
if ( 1 == riOldValue )
{
if ( iValue > 3200 )
{
return false;
}
riOldValue = 0;
a_poOutEvent->m_enType = Me_PLAYERKEYUP;
a_poOutEvent->m_iPlayer = iJoyNumber;
a_poOutEvent->m_iKey = iAxisNumber ? Mk_DOWN : Mk_RIGHT;
return true;
}
riOldValue = 0;
return false;
}
case SDL_JOYBUTTONDOWN:
case SDL_JOYBUTTONUP:
{
int iJoyNumber = a_poInEvent->jbutton.which;
int iButton = a_poInEvent->jbutton.button;
int iPressed = a_poInEvent->jbutton.state == SDL_PRESSED;
debug( "Button down: joy %d, button %d, state %d\n", iJoyNumber, iButton, iPressed );
if ( iButton > 4 )
{
if ( iButton == SDL_JoystickNumButtons(m_apoJoysticks[iJoyNumber]) - 1
&& iPressed )
{
a_poOutEvent->m_enType = Me_MENU;
return true;
}
return false;
}
if ( iJoyNumber > 1 )
{
return false;
}
a_poOutEvent->m_enType = iPressed ? Me_PLAYERKEYDOWN : Me_PLAYERKEYUP;
a_poOutEvent->m_iPlayer = iJoyNumber;
a_poOutEvent->m_iKey = iButton + 4;
return true;
}
case SDL_JOYBALLMOTION:
if( a_poInEvent->jball.ball == 0 )
{
// Nothing for now.
}
break;
case SDL_JOYHATMOTION:
if ( a_poInEvent->jhat.hat & SDL_HAT_UP )
{
// Nothing for now.
}
if ( a_poInEvent->jhat.hat & SDL_HAT_LEFT )
{
// Nothing for now.
}
if ( a_poInEvent->jhat.hat & SDL_HAT_RIGHTDOWN )
{
// Nothing for now.
}
break;
} // end of switch statement
return false;
}
int CJoystick::AxisWorkaround( const SDL_JoyAxisEvent& a_roEvent )
{
if ( 0 == a_roEvent.value ) return -32768;
if ( 127 == a_roEvent.value ) return 0;
if ( -1 == a_roEvent.value ) return 32768;
return 0;
}

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